Doug Mills is not a
newcomer to the racing
world, as he is the
original inventor and
manufacturer of the
stainless steel HiteMike
and CamCheck brought
to market in 1976. You
may be familiar with
them by another name
as they are sold
primarily through
equipment distributors.
Any engine builder or
shop will recognize
these nice tools that
many of us use to set
valve spring installed
height and to degree
our cams.

Doug is an industrial
automation engineer
and designer that
specializes in air
powered robotic
components and holds
patents in that field.
Doug has raced several interesting cars over the years. In 1991 he was the
UDRA nitrous pro stock rookie of the year. In 1993 he was credited with being
the first UDRA car to run a 6 second pass at 200 MPH. Bill Kuhlmann and
Animal Jim had run either one before him but not both. His current house
R&D car is a 6.40 Outlaw ProMod Mustang. The car features a 773 Ford
Shotgun with 4 stages of nitrous. Naturally, as is so often the case, it was
only a matter of time before his work and his recreation would result in a
product for racing.
All Text and images on this website are copyrighted by David Koehler 2000 and beyond
All sales are final. Items and services provided by Koehler Injection are intended for off road use only.
No responsibility whatsoever will be accepted by Koehler Injection for any damage, injury or loss resulting from their use.
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A Review of Combo-Flo  Air Operated Solenoids
Today I would like to show you my results of testing and doing my
best to kill these Airnoids.
General Info
The Airnoids are beautiful
in their simplicity and
operation. A complete
system works like this.
100 to 150 lbs of co2 or
plain old shop air from a
10oz bottle is feed
through 1/4" tubing to the
Actuator which is a baby
electric solenoid. From
the Actuator the co2 is
feed to the Airnoids via
5/32" tubing.
Who?
Doug Mills of Combo-flo
Combo-flo race car
Combo-Flo 500 plate air operted solenoid
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machine shop engine industrial balancing, fuel injection  flow tesing urbana IL
Urbana IL, USA 
217 531 1770  
M-F  9 - 5 CST
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By David Koehler
copyright 11-30-05